Mazda CX-9 Grand Touring. Manual - part 141

1.8-2.2 ohm  

Fig. 8: Measuring Resistance Between Slip Rings With Tester 
Courtesy of MAZDA MOTORS CORP. 

2. Verify that there is no continuity between the slip ring and core using a tester. 



If there is continuity, replace the rotor.  

3. Inspect the slip ring surface condition. 



If the slip ring surface is rough, use a lathe or fine sandpaper to smooth it. 

Fig. 9: Measuring Continuity Between Slip Ring & Core With Tester 
Courtesy of MAZDA MOTORS CORP. 

Stator coil 

1. Verify that the continuity is as indicated in the table. 

 

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2008 ENGINE Charging System (MZI-3.7) - Mazda CX-9

  

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Fig. 10: Continuity Reference Chart 
Courtesy of MAZDA MOTORS CORP. 

Fig. 11: Identifying Stator Coil Terminal 
Courtesy of MAZDA MOTORS CORP. 



If there is any malfunction, replace the stator.  

2. Verify that there is no continuity between the stator coil leads and core using a tester. 



If there is continuity, replace the stator coil. 

Fig. 12: Measuring Continuity Between Stator Coil Leads 
Courtesy of MAZDA MOTORS CORP. 

Brush 

 

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1. Inspect brushes for wear. 



If any brush is worn almost to or beyond the limit, replace all of the brushes.  

Generator brush length  

Standard: 22.5 mm {0.89 in}  

Minimum: 5.0 mm {0.20 in}  

Fig. 13: Identifying Brush Length 
Courtesy of MAZDA MOTORS CORP. 

Brush spring 

1. Measure the force of the brush spring using a spring pressure gauge.  

2. Read the spring pressure gauge at the brush tip projection of 2 mm {0.079 in} . 



Replace the brush spring if necessary.  

Generator brush spring force  

Standard: 4.1-5.3 N {0.42-0.54 kgf, 0.92-1.19 lbf}  

Minimum: 1.7 N {0.17 kgf, 0.38 lbf}  

Fig. 14: Measuring Force Of Brush Spring With Spring Pressure Gauge 

 

2008 Mazda CX-9 Grand Touring 

2008 ENGINE Charging System (MZI-3.7) - Mazda CX-9

  

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Courtesy of MAZDA MOTORS CORP.

Rectifier (Using an analog circuit tester) 

1. Inspect for continuity of the diodes using an analog circuit tester. 



If not as specified, replace the rectifier.  

Specification  

CONTINUITY SPECIFICATION 

Fig. 15: Identifying Rectifier 
Courtesy of MAZDA MOTORS CORP. 

Rectifier (Using a digital circuit tester) 

1. Inspect for continuity of the diodes using a digital circuit tester. 



If not as specified, replace the rectifier.  

Specification  

CONTINUITY SPECIFICATION 

Bearing 

Negative

Positive

Continuity

E

P1, P2, P3, P4, P5, P6

Yes

B

No

P1, P2, P3, P4, P5, P6

E

No

B

Yes

Negative

Positive

Continuity

E

P1, P2, P3, P4, P5, P6

No

B

Yes

P1, P2, P3, P4, P5, P6

E

Yes

B

No

 

2008 Mazda CX-9 Grand Touring 

2008 ENGINE Charging System (MZI-3.7) - Mazda CX-9

  

Microsoft 

 

Sunday, November 15, 2009 9:54:58 AM

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© 2005 Mitchell Repair Information Company, LLC.